Section 2
DESCRIPTION
17
• percent engine load:
Refer to Figure 2-5B for locations of the following
indicators and controls:
• The warning lamp is on or flashing when an
engine operation problem had been detect-
ed by the engine electronics. This usually
does not indicate an electronic malfunction.
This light can be used along with the EMS
lights to determine malfunction. Consult
Table 1 - Engine to Warning Lamp Actions
for engine to warning lamp actions.
• Time To Shutdown is defined as the time
before the engine will shut down following
initial activation of the diagnostic code. It is
assumed the engine has been running for at
least 30 seconds before diagnostic code
activation.
• Start/Restart Time is defined as the time
before a shutdown occurs if conditions
causing the diagnostic code(s) are present
at start up.
• The check engine lamp is used to flash
diagnostic fault codes (See Section 2.9,
Engine Control Module, Functional
Description).
• The air pressure gauge continually moni-
tors the sump pressure at various load
and/or unload conditions.
• The voltmeter monitors the condition of the
batteries and the charging circuit. The nor-
mal reading is 24 to 28 volts.
• The compressor discharge temperature
gauge monitors the temperature of the
air/fluid mixture leaving the compressor unit.
The normal reading should be approximate-
ly 200°F to 230°F (93°C to 110°C).
• The engine switch is used both to energize
the compressor's electrical system and
engage the engine/starter. The knob-type
switch works similar to an automotive key
switch; it turns in a clockwise direction with
"off" being the first position, "ignition" the
second and "start" being the third position. It
also has a built-in anti-restart device that
protects the starter from engaging while the
engine is running. The switch must be
turned back to the "off" position before the
engine can be re-started.
• The warm-up control valve is provided for
cold weather starting. When placed in the
"start" position, the warm-up control valve
cuts off the pressure signal to the pressure
regulating valve causing the inlet valve to
remain closed. It will allow the engine to run
unloaded until it is properly warmed up at
which time the valve should be set in the
"run" position.
• The engine air filter restriction gauge is
provided to monitor engine air filter condi-
tion. A reading over 20 inches of water or in
red zone indicates time to service the air fil-
ter.
• The compressor air filter restriction
gauge is provided to monitor the unit air fil-
ter condition. A reading over 20 inches of
water or in red zone indicates time to serv-
LOAd
Figure 2-5B Instrument Panel Group
When re-starting the compressor,
make sure receiver tank pressure has
blown down to 10 psig (0.7 bar) or less.
More than 10 psig (0.7 bar) can put
extra load on the starter.
NOTE
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